Explosive-engine.



A. J. COLE. EXPLOSIVE ENGINE.

APPLICATION FILED MAR. 5. 1009.

A. J. COLE. EXPLosIvE ENGINE.

APPLICATION FILED MAR. 5, 1 909. l 939,669. Patented Nov. 9, 1909.

3 SHEETS-SHEET 2.

A'. J. COLE.

EXPLOSIVB ENGINE.

APPLICATION FILED MAR. 5, 1009.

y 939,669. Patented NoV.9, 1909.

ALBERT J'. COLE, 0F MINNEAPOLIS, MINNESOTA.

EXPLOSIVE-ENGINE.'

Specication of Letters Patent.

Patented Nov. 9, 1909.

Application led March 5, 1909. 'Serial No. 481,801.

To all whom 'it may concern:

Be it known that l', ALBERT J. COLE, of Minneapolis, Hennepin county, Minnesota, have invented 'certain new and useful Improvements in Explosive-Engines, of which the following is a specification.

The object of my invention is to provide means -in connection. with a gas engine, whereby the piston will have a more rapid movement on the working stroke thereby utilizing the force of the explosion to the greatest advantage and at the same time having a leverage on the crank to the end that considerable power will be gained, and on the compression stroke an economy in power is eifected by providing a leverage on the piston in compressing the charge.

A further object is to Vprovide a connecting means between the'crank shaft and the' piston rod, which will in the cylinder.

A'further object is to provide for a more rapid suction stroke, thus hastening the taking in-of the charge and aiding the work of the cirbureter on a four-cycle engine at slow spee v .A still further object is to provide for more time on the com ression stroke to facilitate the discharge o burned gases and the taking in of a new charge between'the working strokes on a two-cycle engine.

The invention consists generally in interposing a lever between the crank shaft and the connecting rod of an explosive engine, whereby there will be a gain in speed of the piston and a leverage'on the crank during the working stroke, and a leverage on the piston during the compression stroke.

Figure 1 is a view partially in section, illustrating the osition of the parts at a point about half) way of the compression stroke of the engine. Fig. 2 is a similar view, illustrating'the same parts at about the irst quarter of the working stroke of the engine. Fig. 3 is a detail view, showing the eliminate side thrust connecting rod in section for very high speed four-cycle engines and illustrating the form of the lever and the manner of-mount- .ing the same. Fig. 4 is a detail, sectional view, illustrating the manner of mounting the sliding block of the crank shaft on the lever. Fig. 5 is a view similar to Fig. 1, illustrating a modified construction, Fig. 6

4an increased leverage of the is a similar view, illustrating still another construction,I Fig. 7 is a sectional view on the line X'-X of Fig. 5, Fig. 8 is a Aperspective view of the crank shaft roller, Fig. 9 is a view similar to Fig. 5, illustrating means for adjusting a yoke, suspended on the lever, and on which yoke two of the crank rollers Ioperate'. Fig. 10 illustrates still another construction and form of ad- In the drawing, 2 represents the cylinder of an explosion engine having a plston 3 and a connectin rod 4.

5 represents a racket mounted on the cylinder, but any other suitable support may be provided.

6 is a crank shaft and 7 is a lever fulcrumed on the working side of the crank, as at 8 on the bracket 5, and having a pivotal connection at 9 with the connecting rod 4. This lever is preferably T-shaped in cross section, as shown in Fig. 4, but any other form may be used, if preferred.

l0 is a box journaled at 11 on the crank shaft and arranged to slide back and forth on the Alever 7 to accommodate itself to the dierent positions of the crank shaft and connecting rod. Suitable bearings are provided in the box to contact with the lever- 7 and slide freely back and forth.thereon.

plosion has taken place, the fulcrum of the lever will remain the same, the power will be transmitted through ,the connecting rod and the crank will be the load, the device remaining still a lever of the second class, as indicated in Fig. 2. The connection is made so that there will be a loss of time and gain of power on the compression stroke, while on the working stroke or after the explosion, there will be a more rapid movement of the, connecting rod and piston, with iston on the crank, thus increasing the e ective power l of the explosion. .The loss of time upon the compression stroke renders this mechanism particularly applicable to a two-cycle engine, where it is of great importance to clear the cylinder of the burned gases as rapidly ,and completely as possible before the admission of the fresh charge. By providing for a slower movement of the piston at this point, I am able to provide more time for the elimination of the burned gases. and recepltion of the new charge. I have also found t at in a four cycle engine my invention causes a more rapid suction stroke, thus drawing in the charge in less time and inducing a stronger current of air thereby aiding the work of the carbureter.

Various ways may be devised for mounting the sliding box on the lever. In Fig. ,4

I have shown anti-friction rollers 12 between the box and the lever and adjustable plates 13 above the lever and between the to of the box 14 and anti-friction rollers 15, w ich are adapted to travel on the upper surface ofthe lever. Adjusting screws 16 permit the adjustment of the plates 13, for the pury pose of taking up the wear and. preventing lost motion in the bearings of the anti-friction rollers 15. In Fig. 5, a guide' rail 17 is provided, connected with the lever 7 by threaded ends 19 and lock nuts 20 and forming with the lower surface of the lever 7 a guide way 21, in which an anti-friction wheel l22, mounted on the crank shaft, is adapted to roll on the rail 17.- Similar and larger wheels 23 are also mounted on the crankshaft and roll on the under surface of the lever 7. The rolls or anti-friction wheels.

tion rollers between the plates to operate in` the recesses and bear on the edges thereof.

Between the lever 28 and the piston, I have shown in this case, a yielding connection, consisting of a sleeve 31, havin a threaded connection at one end with the ower section of the connecting rod, a spring 32 being 'coiled about said rod within sald sleeve to resist longitudinal strain on the rod, and adapted for use on high-speed, four-cycle engines to relieve the jerk of the piston von' the suction stroke.

In Fig. 9 the yoke 33' is illustrated adjustable on the lever by means of set screws 34:. and yieldingly held by Ameans of springs 35. This yoke has lower side rails connected by cross bolts 36 andthe crank shaft has antifriction wheels 37 to contact with said side rails and an intermediate wheel 38 to bear on the under side'of thelever.

In Fig. 10, a guideway'39is shown in the lever 40, having lower side rails 41 that are adjustable vertically by means of bolts 42 and bearion anti-friction wheels 44 on thex crank shaft. A large central wheel, corresponding to the one shown in Fig. 13, bears on the upper railof the guideway or they under surface of the lever. By means of these plates 41, all lost motion and wear can be taken up and a smooth, uniform movement of the anti-friction roller on the crank shaft obtained.

I claim as my invention 1. The combination, with an explosive engine cylinder, its iston, connecting rod and crank shaft, of a ever having a pivotal connection at a fixed point, and a fixed pivotal connection with said connecting rod, and a connection with said crank shaft, where y a rapid piston movement is obtained on the working stroke and an increase in leverage on the crank, substantially as describe 2. The combination, with an explosive engine cylinder, its piston, connecting rod and crank shaft, of a lever fulcrumed on the working side of the engine and having a xed pivotal connection with said connectand means carried by said crank shaft having a sliding anti-friction bearing on said lever whereby a leverage on the pisvton will be obtained during the compression stroke.

3. The combination, with an explosive engine cylinder, its piston, connecting rod and crank shaft, of a lever having a xed pivotal connection at one end and pivoted at a fixed point intermediate to its ends to said connecting rod, and means connecting said lever and crank shaft wherebya more rapid movement of the piston will be obtained on the working stroke and an increase in leverage on the crank durin` that stroke and a leverage on the piston during the compression stroke.

4. ThieI combination, with an explosive-fem gine cylinder, its piston, connecting rod and crank shaft, of a lever fulcrumed on the working s ide of said engine and crank shaft and having a fixed pivotal connection with said connectin rod, and anti-friction wheels carried by sai crankshaft and having an anti-frict1on bearing von said lever, substantially as described. v Y

5. The combination, with. an explosion engine cylinder, its piston and connecting rod, of a crank shaft, a lever having a fixed pivot at lone end on the working side of said crank shaft, and a fixed pivotal connection inter'- mediate to its ends with said iston rod, a box having anti-friction bearings on said lever and adapted to slide freely thereon,. In witness whereof, I have hereunto set sai blx bing journaled ein said crank sfhat my hand this 2d day of March 1909.

an w ere a more ra i movement 0 t e piston -willy be obtaingd on the working ALBERT J' COLE 5 stroke and an increasing leverage on the Witnesses:

crank during that stroke, and afleverage on RICHARD PAUL,

the piston during the compression stroke. l J. A. BYINGTON. 

